Finding the Fourth Proportional to 74,139, 102,311.82 and 40,605.72

Step by Step Solution

1. Step 1: Write the proportion equation
   74,139 : 102,311.82 = 40,605.72 : x
2. Step 2: Convert to fraction form
   74,139/102,311.82 = 40,605.72/x
3. Step 3: Cross multiply
   74,139x = 102,311.82 × 40,605.72
4. Step 4: Simplify right side
   74,139x = 4,154,445,115.61
5. Step 5: Solve for x
   x = 4,154,445,115.61/74,139
6. Step 6: Final answer
   x = 56,035.89